/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *  2011-03-25 Marco Riccardi - implementation of visitor pattern
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLElement;

public abstract class GeneralPolynomial implements INode {

    private enum MySubclass { Number, Polynomial,}

    public static boolean isGeneralPolynomial(String className){
        boolean found = false;
        for (MySubclass mySubclass :MySubclass.values()){
            if (mySubclass.name().equals(className)){
                found = true;
                break;
            }
        }
        return found;
    }

    public static GeneralPolynomial newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        XMLElement xmlElement = xmlElementList.peek();
        if (!isGeneralPolynomial(xmlElement.getName())){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of GeneralPolynomial", xmlElementList);
        }
        MySubclass mySubclass = MySubclass.valueOf(xmlElement.getName());
        switch (mySubclass) {
        case Number: return Number.newInstance(parentNode, xmlElementList);
        case Polynomial: return Polynomial.newInstance(parentNode, xmlElementList);
        default: throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a subclass of GeneralPolynomial", xmlElementList);
        }
    }

        public LinkedList<XMLElement> getXMLElementList() {
            if (this instanceof Number) {
                return ((Number) this).getXMLElementList();
            } else 
            if (this instanceof Polynomial) {
                return ((Polynomial) this).getXMLElementList();
            } else 
            return new LinkedList<XMLElement>();
        }
}
